Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 30, 2013
Mar. 31, 2012
Income Tax Disclosure [Abstract]    
Provision for income taxes $ 0 $ (77)
Percentage of likelihood of realization that the tax position must exceed in order for the amount to be recognized 50.00%